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2. Installation Guidelines
2.4.1 Lenses
Available lenses
The following lenses are available, or will become available (contact a BARCO service center) as an option :
Lenses
Standard version
QFD(1.27:1)
R9840400
QFD(2.5:1)
R9840290
QFD(1.4-2.1:1)
R9840380
QFD(2.1-3.0:1)
R9840390
QFD(3.5-4.5:1)
R9840060
QFD(4.5-6.0:1)
R9840100
QFD(7:1)
R9840410
QGD (0.8:1) / SW: (1–1.4)m
R9829800
QGD (0.8:1) / SW: (1.7–2.4)m
R9840040
QGD(0.86:1)
R9840491
2.4.2 Lens selection
How to select ?
1. Determine the required screen width.
2. Determine the approximate position of the projector in the projection room with regard to the screen and measure the projector-
screen distance (PD).
3. Use the lens formulas to find the best corresponding PD with regard to the measured projector-screen distance for the required
screen width.
2.4.3 Lens formulas
Formulas
Lenses
Metric Formulas (meter) Inch Formulas (inch)
QFD(1.27:1) PD = 1.29 x SW — 0,0195 + 0,00276 /
SW
PD = 1.29 x SW — 0.768 + 4.278 / SW
QFD(2.5:1) PD = 2.427 x SW + 0,025 + 0,022 / SW PD = 2.427 x SW +0.984 + 34.10 / SW
QFD(1.4-2.1:1) PD
min
= 1,44 x SW + 0,0287 — 0,022 /
SW
PD
max
= 2,20 xSW — 0,01 + 0,020 / SW
PD
min
= 1.44 x SW + 1.13 — 34.10 / SW
PD
max
= 2.20 xSW — 0.39 + 31.00 / SW
QFD(2.1-3.0:1) PD
min
= 2,13 x SW — 0,10 + 0,056 / SW
PD
max
= 2,90 x SW + 0,10 — 0,0745 /
SW
PD
min
=2.13xSW—3.937+86.80/
SW
PD
max
= 2.90 x SW + 3.937 — 115.48 /
SW
QFD(3.4-4.5:1) PD
min
= 3,374 x SW — 0,115 + 0,0575 /
SW
PD
max
= 4,433 x SW — 0,133 + 0,0556
/SW
PD
min
= 3.374 x SW — 4.53 + 89.13 /
SW
PD
max
= 4.433 x SW — 5.24 + 86.18 /
SW
QFD(4.5-6.0:1) PD
min
= 4,29 x SW — 0,02 + 0,0009
/
SW
PD
max
= 5,86 x SW + 0,15 + 0,0121 /
SW
PD
min
= 4.29 x SW — 0.787 + 1.395
/
SW
PD
max
= 5.86 x SW + 5.906 + 18.755 /
SW
QFD(7.0:1) PD = 6,882 x SW — 0,045 + 0,048 / SW PD = 6.882 x SW — 1.772 + 74.4 / SW
R5976455 BARCO ULTRA REALITY 7000 30062003 9